Enable code flushing even when objects were marked incrementally,

src/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1647 matching lines @@
     if (frame->is_optimized()) {
       MarkInlinedFunctionsCode(frame->LookupCode());
     }
   }
 }
 
 
 void MarkCompactCollector::PrepareForCodeFlushing() {
   ASSERT(heap() == Isolate::Current()->heap());
 
-  // TODO(1609) Currently incremental marker does not support code flushing.
-  if (!FLAG_flush_code || was_marked_incrementally_) {
-    EnableCodeFlushing(false);
-    return;
-  }
-
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (heap()->isolate()->debug()->IsLoaded() ||
       heap()->isolate()->debug()->has_break_points()) {
     EnableCodeFlushing(false);
     return;
   }
 #endif
 
   EnableCodeFlushing(true);
 
@@ skipping 284 matching lines @@
       if (marking_deque->IsFull()) return;
     }
   }
 }
 
 
 static inline int MarkWordToObjectStarts(uint32_t mark_bits, int* starts);
 
 
 static void DiscoverGreyObjectsOnPage(MarkingDeque* marking_deque, Page* p) {
+  ASSERT(!marking_deque->IsFull());
   ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0);
   ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
   ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0);
   ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0);
 
   MarkBit::CellType* cells = p->markbits()->cells();
 
   int last_cell_index =
       Bitmap::IndexToCell(
           Bitmap::CellAlignIndex(
@@ skipping 2153 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal